小学四则运算APP 第一个冲刺 第八天

团队成员：陈淑筠、杨家安、陈曦

团队选题：小学四则运算APP

第一次冲刺阶段时间：11.17~11.27

本次发布的是还未完成的功能二（选择题）：

ChoiceActivity.java:

package com.example.calculator;

import java.util.Random;

import android.os.Bundle;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.TextView;

public class ChoiceActivity extends Activity {
private TextView text1,text2,text3;
private RadioButton radioButton1,radioButton2,radioButton3,radioButton4;
private Button btn;

private final Random num1=new Random();
private final Random num2=new Random();
private final Random r = new Random();
private int x1;
private int x2;
private int x3;

private char[] ch={'+','-','*','/'}; //字符数组
private int index = r.nextInt(ch.length); //随机数，小于数组的长度数, 0~3
private char d=ch[index];

@Override
protected void onCreate(Bundle savedInstanceState) {
ActionBar actionBar=getActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_choice);
text1=(TextView)findViewById(R.id.textView1);
text2=(TextView)findViewById(R.id.textView2);
text3=(TextView)findViewById(R.id.textView3);
radioButton1=(RadioButton)findViewById(R.id.radioButton1);
radioButton2=(RadioButton)findViewById(R.id.radioButton2);
radioButton3=(RadioButton)findViewById(R.id.radioButton3);
radioButton4=(RadioButton)findViewById(R.id.radioButton4);
btn=(Button)findViewById(R.id.button1);

final String a=String.valueOf(num1.nextInt(100));
x1=Integer.valueOf(a);
final String b=String.valueOf(num2.nextInt(100));
x2=Integer.valueOf(b);
final String e=String.valueOf(d);

text1.setText(a);
text3.setText(b);
text2.setText(e);

radioButton1.setText(a);
radioButton2.setText(b);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.choice, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case android.R.id.home:
//创建启动MainActivity的Intent
Intent intent=new Intent(this,TypesActivity.class);
//添加额外的Flag，将Activity栈中处于MainActivity之上的Activity弹出
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
break;

default:
break;
}
return super.onOptionsItemSelected(item);
}
}

activity_choice.xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@drawable/animal"
tools:context=".ChoiceActivity" >

<TextView
android:id="@+id/textView1"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_marginTop="100dp" />

<TextView
android:id="@+id/textView2"
android:layout_width="30dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView1"
android:layout_alignBottom="@+id/textView1"
android:layout_toRightOf="@+id/textView1" />

<TextView
android:id="@+id/textView3"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView2"
android:layout_alignBottom="@+id/textView2"
android:layout_toRightOf="@+id/textView2" />

<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView3"
android:layout_alignBottom="@+id/textView3"
android:layout_toRightOf="@+id/textView3"
android:text="=" />

<RadioButton
android:id="@+id/radioButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/radioButton1"
android:layout_centerVertical="true" />

<RadioButton
android:id="@+id/radioButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/radioButton2" />

<RadioButton
android:id="@+id/radioButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/radioButton3"
android:layout_below="@+id/radioButton3" />

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/radioButton4"
android:layout_centerHorizontal="true"
android:layout_marginTop="46dp"
android:text="确定" />

<RadioButton
android:id="@+id/radioButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/radioButton2"
android:layout_toLeftOf="@+id/button1" />

</RelativeLayout>

运行结果：